A 3D illustration of a metasurface skin cloak made from an ultrathin layer of nanoantennas (gold blocks) covering an arbitrarily shaped object. Light reflects off the cloak (red arrows) as if it were reflecting off a flat mirror.
(From left) Yuan Wang, Zi Jing Wong and Xiang Zhang have devised an ultra-thin invisibility “skin” cloak that can conform to the shape of an object and conceal it from detection with visible light.